================================ WARNING: inconsistent lock state syzkaller #0 Not tainted -------------------------------- inconsistent {INITIAL USE} -> {IN-NMI} usage. syz.6.6495/28274 [HC1[1]:SC0[0]:HE0:SE1] takes: ffffe8ffffd63600 (&loc_l->lock){....}-{2:2}, at: bpf_common_lru_push_free kernel/bpf/bpf_lru_list.c:514 [inline] ffffe8ffffd63600 (&loc_l->lock){....}-{2:2}, at: bpf_lru_push_free+0x33b/0xbb0 kernel/bpf/bpf_lru_list.c:553 {INITIAL USE} state was registered at: lock_acquire+0x106/0x330 kernel/locking/lockdep.c:5868 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x40/0x60 kernel/locking/spinlock.c:162 bpf_common_lru_pop_free kernel/bpf/bpf_lru_list.c:440 [inline] bpf_lru_pop_free+0x1a1/0x1ca0 kernel/bpf/bpf_lru_list.c:496 prealloc_lru_pop kernel/bpf/hashtab.c:296 [inline] __htab_lru_percpu_map_update_elem+0x1d2/0x7b0 kernel/bpf/hashtab.c:1361 bpf_percpu_hash_update+0x119/0x200 kernel/bpf/hashtab.c:2431 bpf_map_update_value+0x45a/0x920 kernel/bpf/syscall.c:272 generic_map_update_batch+0x6ea/0x990 kernel/bpf/syscall.c:2031 bpf_map_do_batch+0x39b/0x630 kernel/bpf/syscall.c:5658 __sys_bpf+0x7c1/0x950 kernel/bpf/syscall.c:-1 __do_sys_bpf kernel/bpf/syscall.c:6331 [inline] __se_sys_bpf kernel/bpf/syscall.c:6329 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6329 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f irq event stamp: 1144 hardirqs last enabled at (1143): [] ___slab_alloc+0xbb5/0x1760 mm/slub.c:4555 hardirqs last disabled at (1144): [] exc_debug_kernel+0x60/0x140 arch/x86/kernel/traps.c:1233 softirqs last enabled at (1100): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (1100): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (1100): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 softirqs last disabled at (791): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (791): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (791): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&loc_l->lock); lock(&loc_l->lock); *** DEADLOCK *** no locks held by syz.6.6495/28274. stack backtrace: CPU: 1 UID: 0 PID: 28274 Comm: syz.6.6495 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 Call Trace: <#DB> dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_usage_bug+0x28b/0x2e0 kernel/locking/lockdep.c:4042 lock_acquire+0x1cc/0x330 kernel/locking/lockdep.c:5859 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x40/0x60 kernel/locking/spinlock.c:162 bpf_common_lru_push_free kernel/bpf/bpf_lru_list.c:514 [inline] bpf_lru_push_free+0x33b/0xbb0 kernel/bpf/bpf_lru_list.c:553 htab_lru_push_free kernel/bpf/hashtab.c:1189 [inline] htab_lru_map_delete_elem+0x3a3/0x410 kernel/bpf/hashtab.c:1479 bpf_prog_464bc2be3fc7c272+0x43/0x4b bpf_dispatcher_nop_func include/linux/bpf.h:1401 [inline] __bpf_prog_run include/linux/filter.h:723 [inline] bpf_prog_run include/linux/filter.h:730 [inline] bpf_overflow_handler kernel/events/core.c:10303 [inline] __perf_event_overflow+0x3b7/0xec0 kernel/events/core.c:10402 perf_swevent_overflow kernel/events/core.c:10536 [inline] perf_swevent_event+0x323/0x650 kernel/events/core.c:-1 perf_bp_event+0x2a6/0x390 kernel/events/core.c:11395 hw_breakpoint_handler arch/x86/kernel/hw_breakpoint.c:556 [inline] hw_breakpoint_exceptions_notify+0x243/0x680 arch/x86/kernel/hw_breakpoint.c:587 notifier_call_chain+0x19d/0x3a0 kernel/notifier.c:85 atomic_notifier_call_chain+0xda/0x180 kernel/notifier.c:223 notify_die+0x144/0x1a0 kernel/notifier.c:588 notify_debug+0x2e/0x50 arch/x86/kernel/traps.c:1208 exc_debug_kernel+0xb1/0x140 arch/x86/kernel/traps.c:1270 asm_exc_debug+0x1e/0x40 arch/x86/include/asm/idtentry.h:654 RIP: 0010:__get_user_nocheck_8+0x9/0x20 arch/x86/lib/getuser.S:159 Code: 3d 04 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 01 cb 0f ae e8 48 8b 10 <31> c0 0f 01 ca e9 0d 3d 04 00 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc9000bfa7b38 EFLAGS: 00040a07 RAX: 0000200000000300 RBX: 0000000000000000 RCX: 1ffff9200181f200 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc9000bfa7cc0 R08: 0000000000000dc0 R09: 00000000ffffffff R10: 0000000000000009 R11: ffffffff81afb1d0 R12: dffffc0000000000 R13: 0000000000000000 R14: 1ffff920017f4f7c R15: 0000000000000000 bpf_uprobe_multi_link_attach+0x625/0x1020 kernel/trace/bpf_trace.c:3249 link_create+0x673/0x850 kernel/bpf/syscall.c:5762 __sys_bpf+0x468/0x950 kernel/bpf/syscall.c:6288 __do_sys_bpf kernel/bpf/syscall.c:6331 [inline] __se_sys_bpf kernel/bpf/syscall.c:6329 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6329 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc654d9aeb9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc655ccc028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fc655015fa0 RCX: 00007fc654d9aeb9 RDX: 0000000000000040 RSI: 0000200000000180 RDI: 000000000000001c RBP: 00007fc654e08c1f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc655016038 R14: 00007fc655015fa0 R15: 00007ffe21c81a48 ---------------- Code disassembly (best guess): 0: 3d 04 00 90 90 cmp $0x90900004,%eax 5: 90 nop 6: 90 nop 7: 90 nop 8: 90 nop 9: 90 nop a: 90 nop b: 90 nop c: 90 nop d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop 16: 90 nop 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 90 nop 1e: 90 nop 1f: 90 nop 20: 90 nop 21: 0f 01 cb stac 24: 0f ae e8 lfence 27: 48 8b 10 mov (%rax),%rdx * 2a: 31 c0 xor %eax,%eax <-- trapping instruction 2c: 0f 01 ca clac 2f: e9 0d 3d 04 00 jmp 0x43d41 34: 90 nop 35: 90 nop 36: 90 nop 37: 90 nop 38: 90 nop 39: 90 nop 3a: 90 nop 3b: 90 nop 3c: 90 nop 3d: 90 nop 3e: 90 nop 3f: 90 nop